水喷雾特性对特高压站主变压器火灾的影响研究  

Study on the influence of water spray extinguishing system on transformer fire

作　　者：田珍[1] 甘露[1] 张盘玉 郭莹莹 唐智[2] 方正[2] TIAN Zhen;GAN Lu;ZHANG Panyu;GUO Yingying;TANG Zhi;FANG Zheng(ShanDong Electric Power Engineering Consulting Institute Co.,Ltd.,Jinan 250000,China;School of Civil Engineering,Wuhan University,Wuhan 430072,China;Hebei Branch,China Nuclear Power Engineering Co.,Ltd.,Shijiazhuang 050000,China)

机构地区：[1]山东电力工程咨询院有限公司,济南250000 [2]武汉大学土木建筑工程学院,武汉430072 [3]中国核电工程有限公司河北分公司,石家庄050000

出　　处：《给水排水》2023年第3期104-110,共7页Water & Wastewater Engineering

基　　金：湖北省重点研发计划项目(2020BAB118);山东电力工程咨询院有限公司项目(37-2021-34-K0007)。

摘　　要：建立了特高压站主变压器火灾数值模型,对水喷雾灭火系统作用于变压器的灭火效果开展了模拟研究,探究了喷雾强度、雾滴粒径和雾滴初始速度对主变压器火灾的灭火影响规律,水喷雾灭火系统灭火效果与水雾强度和初始动量成正相关性,并建立了喷雾强度与灭火时间的拟合关系。结果表明,喷雾粒径存在一个最优灭火粒径范围,平均粒径为400~500μm的水喷雾较适用于扑灭特高压主变火灾;以灭火所需的消防水量最小为优化目标,得到灭火最优喷雾强度为8.11 L/(min·m^(2)),并对实际设计中喷雾强度选取进行了探讨。A numerical model for an oil-immersed power transformer of ultra-high voltage station has been established to investigate the effect of water spray system on main transformer fire by considering different spray intensity,droplet size and initial droplet velocity of water spray system.Results show that the fire suppression performance of the water spray system are positively related to the spray intensity and its initial momentum,and a correlation between water spray intensity and fire extinguishment time is proposed.Furthermore,there is an optimal droplet size range for fire extinguishment or the main transformer,ranging from 400 to 500μm.An optimum spray density,8.11L/(min·m^(2)),is found with the optimal goal of minimum quantity of water required for fire extinguishment.Finally,the spray density selected for practical design is discussed.

关 键 词：油浸式电力变压器 特高压 水喷雾 灭火效率 

分 类 号：TU998[建筑科学—市政工程]